Ruri RocksRuri Rocks.

Ruri Rocks (Japanese: 瑠璃の宝石, Hepburn: Ruri no Hōseki; lit. 'Ruri's Jewels'), also known as Introduction to Mineralogy, is a Japanese manga series written and illustrated by Keiichirō Shibuya. The story features high school student Ruri, a girl who loves minerals and jewelry who meets graduate student Nagi, fostering an interest in mineralogy. It has been serialized in Enterbrain's seinen manga magazine Harta since August 2019, with its chapters collected into eight tankōbon volumes as of September 2026.